Imaging soft X-ray spectroscopy at the small quantum systems instrument of the European XFEL

Authors: Jan-Erik Rubensson (Uppsala University) , Marcus Agaker (Uppsala University; Max IV) , Hans Agren (Uppsala University; Max IV) , Olle Björneholm (Uppsala University) , Rebecca Boll (European X-Ray Free-Electron Laser Facility) , John Bozek (Synchrotron SOLEIL) , Sebastian Cardoch (Uppsala University) , Lucas Medeiros Cornetta , Sonia Coriani (Technical University of Denmark) , Alberto De Fanis (7 European X-Ray Free-Electron Laser Facility) , Emiliana De Santis (Uppsala University) , Simon Dold (European X-Ray Free-Electron Laser Facility) , Gilles Doumy (Uppsala University; Max IV) , Ulli Eichmann (Max-Born-Institut) , Xiaochun Gong (East China Normal University) , Johan Gråsjö (Uppsala University) , Iyas Ismail (Sorbonne Université) , Ludvig Kjellsson (Max IV) , Kai Li (Argonne National Laboratory) , Eva Lindroth (Stockholm University) , Cecilia Sanchez-Hanke (Diamond Light Source)
Co-authored by industrial partner: No

Type: Conference Paper
Conference: 41st International Conference on Vacuum Ultraviolet and X-ray Physics (VUVX 20)
Peer Reviewed: No

State: Published (Approved)
Published: July 2023

Abstract: We present the first measurements with the 1D imaging soft X-ray spectrometer [1], recently installed at the at the Small Quantum Systems (SQS) instrument [2] of the European XFEL. The imaging capability allows for separation of emission spectra excited along the path of the X-ray incident beam, intended to facilitate investigation of non-linear X-ray-matter interactions in dense gaseous media, and time-resolved pump-probe measurements. The soft X-ray fluorescence spectra of Ne and Xe show a rich phenomenology with a multitude of emission lines, critically depending on photon energy, fluence, and target density. The dependence on the incident photon energy shows a complex resonant behavior 23 that enables a detailed characterization of the population mechanisms for core excited states in multiply ionized species [3], for Ne including all charge states. Core excited states with lifetimes in the ps-ns range are studied with time resolution, and as a function of target density, thereby enabling us to address interactions with the surrounding plasma. Pulse propagation effects become manifest in non-trivial spectral variations over the imaged path of the incident photons.

Subject Areas: Technique Development, Physics

Facility: SQS at European XFEL

Added On: 10/01/2024 11:46

Discipline Tags:

Physics Technique Development - Physics

Technical Tags: